package com.atguigu.gmall.item.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.list.client.ListFeignClient;
import com.atguigu.gmall.model.product.BaseCategoryView;
import com.atguigu.gmall.model.product.SkuInfo;
import com.atguigu.gmall.model.product.SpuSaleAttr;
import com.atguigu.gmall.product.client.ProductFeignClient;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.math.BigDecimal;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * @author 李旭
 * @date 2022/1/8 9:09
 * @Description:
 */
@RestController
@RequestMapping("/api/item")
@Api(tags = "商品详情")
public class ItemApiController {

    @Autowired
    private ProductFeignClient productFeignClient;
    @Autowired
    private ThreadPoolExecutor threadPoolExecutor;
    @Autowired
    private ListFeignClient listFeignClient;

    //数据汇总 ：
    @GetMapping("/getItem/{skuId}")
    @ApiOperation(value = "数据汇总方法")
    public Map getItem(@ApiParam(value = "库存ID") @PathVariable Long skuId){
        Map result = new HashMap();

        CompletableFuture<SkuInfo> skuInfoCompletableFuture = CompletableFuture.supplyAsync(() -> {
            //1: 查询skuInfo
            SkuInfo skuInfo = productFeignClient.getSkuInfo(skuId);
            result.put("skuInfo", skuInfo);
            return skuInfo;
        }, threadPoolExecutor);

        CompletableFuture<Void> categoryViewCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            //3、根据category3Id查询一二三级分类
            BaseCategoryView baseCategoryView = productFeignClient.
                    getBaseCategoryView(skuInfo.getCategory3Id());
            result.put("categoryView", baseCategoryView);
        }, threadPoolExecutor);

        CompletableFuture<Void> spuSaleAttrListCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            //4、根据spuId查询spu_sale_attr_value(被选中项）  商品ID spu  库存ID
            List<SpuSaleAttr> spuSaleAttrList = productFeignClient.
                    getSpuSaleAttrValue(skuInfo.getSpuId(), skuInfo.getId());
            result.put("spuSaleAttrList", spuSaleAttrList);
        }, threadPoolExecutor);

        CompletableFuture<Void> valuesSkuJsonCompletableFuture = skuInfoCompletableFuture.thenAcceptAsync(skuInfo -> {
            //5、skuId与销售属性组合
            Map map = productFeignClient.spuValueIdsMap(skuInfo.getSpuId());
            result.put("valuesSkuJson", JSONObject.toJSONString(map));
        }, threadPoolExecutor);

        CompletableFuture<Void> priceCompletableFuture = CompletableFuture.runAsync(() -> {
            //2:查询实时价格   优化的时候 不要放进缓存中
            BigDecimal price = productFeignClient.getPrice(skuId);
            result.put("price", price);
        }, threadPoolExecutor);

        //6：远程调用 搜索微服务的+分接口
        CompletableFuture.runAsync(() -> {
            listFeignClient.hotScore(skuId,500L);
        },threadPoolExecutor);

        //多任务组合
        CompletableFuture.allOf(priceCompletableFuture,
                valuesSkuJsonCompletableFuture,
                spuSaleAttrListCompletableFuture,categoryViewCompletableFuture).join();

        return result;
    }



}
